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Fukushima Daiichi Unit 5 Begins Fuel Removal

Fukushima Daiichi Unit 5 Begins Fuel Removal

TEPCO has begun work to remove fuel from the reactor to the spent fuel pool at unit 5 Fukushima Daiichi. Prior to fuel removal, work was conducted to test equipment and prepare for the work. Fuel will remain in the spent fuel pool. http://www.tepco.co.jp/nu/fukushima-np/handouts/2014/images/handouts_141031_04-j.pdf This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content cited, quoted etc. from other sources is under the … Read entire article »

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Fukushima Worker Electrocuted, 3 Power Issues At Plant

An electrician was electrocuted while working on the new office building at Fukushima Daiichi. The worker was taken to the Iwaki hospital and is expected to be there for a number of days. Two apparently unrelated power issues also happened at the plant the same day. A low voltage alarm went off repeatedly in the common pool building. No reason could be found so workers reset the system. The RHR cooling system for unit 5 was also shut off while workers inspected a power panel and replaced some equipment. No abnormalities were documented in either case. http://www.tepco.co.jp/nu/fukushima-np/handouts/2014/images/handouts_140930_05-j.pdf This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content cited, quoted etc. from other sources is under the respective rights of that … Read entire article »

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TEPCO Finally Repairs Unit 5 Spent Fuel Pool Cooling

TEPCO Finally Repairs Unit 5 Spent Fuel Pool Cooling

After weeks of unit 5 not having an operational spent fuel pool cooling system, TEPCO has finally replaced the leaking valve. The valve interior showed considerable corrosion that lead to the leak. TEPCO failed to explain why it took them so long to repair the system. While the repair was delayed the spent fuel pool and reactor vessel that still contains fuel had to share the reactor cooling system. Unit 5 is the second newest reactor … Read entire article »

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Unit 5 Fukushima Remains On Shared Cooling, No Repair Stated; July 14, 2014

Unit 5 Fukushima Remains On Shared Cooling, No Repair Stated; July 14, 2014

TEPCO again has posted no information about the needed repair of the spent fuel pool cooling system on unit 5 again today. The reactor and pool remain on shared cooling using the RHR system. While this is keeping both within safe temperatures it is not a situation that should become permanent. Graphs below from hourly data feeds. This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at … Read entire article »

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Fukushima Unit 5 Alternate Cooling, No ETA For System Repair; July 13, 2014

Fukushima Unit 5 Alternate Cooling, No ETA For System Repair; July 13, 2014

TEPCO still has not given any further information about the needed repair of the leaking valve for the main cooling system used by the spent fuel pool of unit 5. Alternate cooling by sharing the RHR system for the reactor vessel continues as can be seen in the hourly data feeds. Previously reported, the RHR system was having a minor oil leak problem, TEPCO did a temporary fix. This makes restoration of the normal cooling … Read entire article »

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Fukushima Unit 5 Continues Alternate Cooling

Fukushima Unit 5 Continues Alternate Cooling

Unit 5 continues to operate on shared cooling with the reactor vessel. Graphs of hourly temperature data pulled today show again, the back and forth trend in temperature changes as they shift cooling between the vessel and the pool. The high temperature seen in the RPV graph is 42.5c. Also mentioned today in TEPCO’s daily reports, unit 6 has returned to cooling the spent fuel pool after a short outage to test the fuel gate.   RPV … Read entire article »

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Fukushima Unit 5 Experiences Additional Cooling Problem

Fukushima Unit 5 Experiences Additional Cooling Problem

    TEPCO switched the unit 5 spent fuel pool over to sharing the cooling system for the reactor (the RHR system) earlier this week after the valve failure. The reactor and spent fuel pool have been sharing cooling in an alternating fashion for at least two days. Today TEPCO admits that the replacement pump installed for the RHR system in 2012 has been having oil leak problems since June. Yesterday a temporary fix was done to … Read entire article »

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Fukushima Unit 5 Reactor Temperature Rises

Fukushima Unit 5 Reactor Temperature Rises

TEPCO’s statements earlier this week that they would use a back and forth method of cooling the spent fuel pool by sharing the reactor cooling system appears to be underway. The reactor temperature has risen 12 degrees Celsius since July 8th. Spent fuel temperature rose but fell down closer to normal over the same time frame. While these changes are not alarming they do warrant close monitoring to assure they are staying within safe ranges … Read entire article »

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Fukushima Unit 5 Spent Fuel Pool On Alternative Cooling

Fukushima Unit 5 Spent Fuel Pool On Alternative Cooling

Yesterday TEPCO reported that they had restarted the regular cooling system of unit 5′s spent fuel pool. The report indicated that the normal cooling system (the one with the leak) had been restarted. No permanent fix was mentioned. Today’s reports indicate that the pool is being cooled, but is being done by sharing the system used for the reactor. Nothing was mentioned about the repair plan for the leaking valve. The most recent graphs for unit … Read entire article »

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TEPCO Restarts Fukushima Unit 5 Pool Cooling Without Permanent Fix

TEPCO Restarts Fukushima Unit 5 Pool Cooling Without Permanent Fix

TEPCO has announced they have restarted the cooling system for unit 5 just days after stopping it due to a valve body leak. TEPCO mentions in this handout of the restart but there is no permanent fix mentioned as being completed or proposed. Earlier reports said TEPCO would suspend the system until they could determine a permanent fix. Apparently some patch on a cracked valve is now considered a permanent fix. Temps in the spent fuel continue … Read entire article »

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Clock Ticks On Fukushima Unit 5 Cooling Outage As Typhoon Hits Japan

Clock Ticks On Fukushima Unit 5 Cooling Outage As Typhoon Hits Japan

TEPCO reported over the weekend that they found a leak in a valve that is part of the cooling system used for the spent fuel pool of unit 5. The system was stopped as they identified the leak. TEPCO noted they have about 9 days before the spent fuel pool would reach a heat level that they are required to report it to authorities (65 Celsius). The “reactor auxiliary cooling system” was found to have the … Read entire article »

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Japan To Locate Nuclear Waste Site Without Local Approval, TEPCO Scraps Units 5 & 6

Japan To Locate Nuclear Waste Site Without Local Approval, TEPCO Scraps Units 5 & 6

METI has indicated that the Japanese government plans to create high level nuclear waste sites in the country but without obtaining local government approval. These would be permanent storage sites for high level nuclear waste. This could include anything from spent fuel to highly radioactive debris and melted fuel from Fukushima Daiichi. The government has had no local community come forward to accept the site plan over a series of years where attempts were made … Read entire article »

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Oddities Found Near Unit 5 Fukushima Daiichi

TEPCO’s air testing near each reactor unit produced an interesting situation. The readings were taken at the same locations at each reactor yet unit 5′s levels are generally higher or as high as the levels near units 1-4. Considering units 5 and 6 didn’t have meltdowns and sit a considerable distance away from units 1-4 these readings do not make sense. TEPCO provides no explanation. The cesium 134 readings were notably higher than the units that suffered meltdowns. The scaling factor and density limits used are the same for all units. TEPCO’s handout AirSamplingBuildings_130123-e This article would not be possible without the extensive efforts of the SimplyInfo research team Join the conversation at chat.simplyinfo.org All content is copyright SimplyInfo.org. Content cited, quoted etc. from other sources is under the respective rights of that content owner. … Read entire article »

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Officials – Piping At Fukushima Unit 5 Has Insufficient Quake Resistance

Officials have admitted that unit 5 at Fukushima has pipe and support systems that did not meet 2006 anti-quake standards. This includes the main water supply pipes to the reactor. Anti quake standards were raised in 2006, TEPCO acknowledged the increased risk to the reactors but did no reinforcement work. They also did not submit any test results showing the reactors were compliant as is. Apparently TEPCO simply did nothing about the 2006 standards changes. This is in step with our findings of work done in response to the 2007 earthquake at Kashiwazaki-Kariwa. TEPCO was told by NISA to do earthquake upgrades. What was done was highly superficial items like some small tank tie downs and a rail in the control room. In 2007 no work was done to piping … Read entire article »

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Fukushima Daiichi – Issues at Unit 5

There have been concerns that something is going on at Unit 5 (and possibly 6) at Fukushima Daiichi. A number of reports of pieces of information have been coming out. While there is no clear theory about exactly what is going on at units 5 and 6, much of the activities seem to focus on the water intake systems. Unit 5 Photos of quake damage at unit 5 http://mainichi.jp/select/jiken/graph/20110924/8.html Videos of intake damage (taken by TEPCO) Unit 5 auxiliary sea water intake  http://www.youtube.com/watch?v=T2igL2Jz5Yc  Unit 5 RHRS sea water intake http://www.youtube.com/watch?v=MjPWWZWXhCc Unit 6 auxiliary sea water intake http://www.youtube.com/watch?v=WYM6lKI3CVo Unit 6 RHRS sea water intake  http://www.youtube.com/watch?v=8QpDuEYkVKk Some damage was noted on the intakes including broken pipes below the intakes at unit 5 and what appears to be a broken wall on the concrete sump box for the auxiliary sea water intake … Read entire article »

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